[1] The body of proto-celadon was high-fired, the Chinese classification including porcelain, with an iron content below 3%.
[2] From the Han dynasty onward, production greatly improved in quantity and quality.
[2] From the Eastern Han period, true celadon ware (Chinese: 成熟青瓷) started to appear, with production focused in Zhejiang province.
[1] Although still following the shapes and patterns of proto-celadon wares, these advances now represented the characteristics of porcelain, with refined clays and appropriate firing temperatures.
[1] These advances were followed by those of Yue ware, and the blooming of celadon production from the period of the Song dynasty.